It can't just be me who occasionally has the experience of having the penny drop with regard to some allusion/quote or verbal play long after you heard it and failed to get it.
The one that hit me recently: years ago I watched the quizzing-based rom com Starter for Ten and there's a scene where the main character - a quiz geek who loves sprinkling quotations into his everyday conversation - falls totally flat with an attempted joke at an awkward dinner with his girlfriend's parents. He says he came to Suffolk once before, on a mountaineering holiday. "But there aren't any mountains in Suffolk!" So he says "I was misinformed". I only realised much later that that was an apparently well-known line from a famous film which I'd seen many times.
The one that hit me recently: years ago I watched the quizzing-based rom com Starter for Ten and there's a scene where the main character - a quiz geek who loves sprinkling quotations into his everyday conversation - falls totally flat with an attempted joke at an awkward dinner with his girlfriend's parents. He says he came to Suffolk once before, on a mountaineering holiday. "But there aren't any mountains in Suffolk!" So he says "I was misinformed". I only realised much later that that was an apparently well-known line from a famous film which I'd seen many times.